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Nodes, items, crafting: Improve readability

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en/chapters/nodes_items_crafting.md
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@ -6,52 +6,69 @@ root: ../../
## Introduction ## Introduction
In this chapter we will learn how to register a new node or craftitem, Registering new nodes and craftitems, and creating craft recipes, are
and create craft recipes. basic requirements for many mods.
* Item Strings * [Item Strings](#item-strings)
* Textures * [Overriding](#overriding)
* Registering a Craftitem * [Textures](#textures)
* Foods * [Registering a Craftitem](#registering-a-craftitem)
* Registering a basic Node * [Foods](#foods)
* Crafting * [Foods, extended](#foods-extended)
* Groups * [Registering a Basic Node](#registering-a-basic-node)
* [Crafting](#crafting)
* [Shaped](#shaped)
* [Shapeless](#shapeless)
* [Cooking](#cooking)
* [Fuel](#fuel)
* [Groups](#groups)
* [Dig Types](#dig-types)
## Item Strings ## Item Strings
Each item, whether that be a node, craftitem, tool, or entity, has an item string.\\
This is sometimes referred to as registered name or just name.
A string in programming terms is a piece of text. A string in programming terms is a piece of text.
Each in-game item, whether a node, craftitem, tool, or entity, has an item string.
This is sometimes referred to as its registered name or just its name. It takes the format:
modname:itemname modname:itemname
The modname is the name of the folder your mod is in. The modname is the name of the mod in which the item is registered, and the
You may call the itemname anything you like; however, it should be relevant to itemname is the name of the item itself.
what the item is and it can't already be registered. The itemname should be relevant to what the item is and can't already be registered.
### Overriding ### Overriding
Overriding allows you to: Overriding allows you to:
* Redefine an existing item. * Redefine an existing item.
* Use an item string with a different modname. * Use a different modname.
To override, you prefix the item string with a colon, ``:``. To override an item, prefix the item string with a colon, ``:``.
Declaring an item as ``:default:dirt`` will override the default:dirt in the default mod. For example, declaring an item as ``:default:dirt`` will override
default:dirt in the default mod.
## Textures ## Textures
Textures are usually 16 by 16 pixels. Textures in Minetest are usually 16 by 16 pixels.
They can be any resolution, but it is recommended that they are in the order of 2 (eg, 16, 32, 64, 128, etc), They can be any resolution, but it is recommended that they are in the order of 2,
as other resolutions may not be supported correctly on older devices. for example 16, 32, 64, or 128,
because other resolutions may not be supported correctly on older devices.
Textures should be placed in textures/. Their name should match ``modname_itemname.png``.\\ Textures should be placed in the textures/ folder with names in the format
JPEGs are supported, but they do not support transparency and are generally bad quality at low resolutions. ``modname_itemname.png``.\\
JPEG textures are supported, but do not support transparency and are generally
bad quality at low resolutions. It is often better to use the PNG format.
## Registering a Craftitem ## Registering a Craftitem
Craftitems are the simplest items in Minetest. Craftitems cannot be placed in the world. Craftitems are the simplest items in Minetest. They cannot be placed in the world.
They are used in recipes to create other items, or they can be used by the player, such as food. They are used in recipes to create other items, or can be used by the player.
Examples include food items which can be eaten and metal ingots which can be
crafted into tools or placeable nodes.
Item definitions usually include a unique
[item string](#item-strings) and a definition table. The definition table
contains attributes which affect the behaviour of the item. For example:
{% highlight lua %} {% highlight lua %}
minetest.register_craftitem("mymod:diamond_fragments", { minetest.register_craftitem("mymod:diamond_fragments", {
@ -60,13 +77,10 @@ minetest.register_craftitem("mymod:diamond_fragments", {
}) })
{% endhighlight %} {% endhighlight %}
Item definitions like the one seen above are usually made up of a unique
[item string](#item-strings) and a definition table. The definition table
contains attributes which affect the behaviour of the item.
### Foods ### Foods
Foods are items that cure health. To create a food item you need to define the on_use property like this: Foods are items which restore health. To create a food item you need to define
the on_use property of the item:
{% highlight lua %} {% highlight lua %}
minetest.register_craftitem("mymod:mudpie", { minetest.register_craftitem("mymod:mudpie", {
@ -76,16 +90,18 @@ minetest.register_craftitem("mymod:mudpie", {
}) })
{% endhighlight %} {% endhighlight %}
The number supplied to the minetest.item_eat function is the number of hit points that are healed by this food. The number supplied to the minetest.item_eat function is the number of hit points
Two hit points make one heart and because there are 10 hearts there are 20 hitpoints. healed when this food is consumed.
Hitpoints don't have to be integers (whole numbers), they can be decimals. Each heart icon the player has is worth two hitpoints. A player can usually have up to
10 hearts, which is equal to 20 hitpoints.
Hitpoints don't have to be integers (whole numbers); they can be decimals.
Sometimes you may want a food to be replaced with another item when being eaten, Sometimes you may want a food item to be replaced with another item after it is eaten,
for example smaller pieces of cake or bones after eating meat. To do this, use: for example smaller pieces of cake or bones after eating meat. To do this, use:
minetest.item_eat(hp, replace_with_item) minetest.item_eat(hp, replace_with_item)
Where replace_with_item is an item string. In this example replace_with_item must be an item string.
### Foods, extended ### Foods, extended